Launched in May 2015, Junctions 9 is the latest version of TRL's industry-standard package for modelling roundabouts and priority junctions.
Click here for a summary of new features and enhancements in Junctions 9
Junctions 9 consists of ARCADY 9 (the Roundabout Module) and PICADY 9 (the Priority Intersection Module), which are sold and licensed separately.
Based on over three decades of research and development, the
ARCADY module is used to model and predict capacity, queues and delays at
Roundabouts are modelled using the well-established
TRL/Kimber capacity relationships (the ARCADY Model), which take into account
key roundabout geometries and intrinsically links roundabout geometry to driver
behaviour and, in turn, to predicted capacities, queues and delays. North American
customers also have the option of using the HCM-2010 model to analyse roundabout
ARCADY now includes a unique set of tools to help with the
measurement of standard and mini-roundabout geometries such as entry width,
flare length and entry radius.
PICADY is the other module in Junctions and is used for modelling
priority-controlled junctions such as crossroads and T-junctions. PICADY 9 sees
the implementation of additional models applicable to North America and allows
users to setup and model Two-Way Stop Controlled (TWSC) and All-Way Stop
Controlled (AWSC) intersections.
Having previously been a feature of ARCADY, now included
within PICADY is the ability to quickly see where unbalanced queuing may occur
using the Lane Simulation tool. If running both Junctions 9 modules, it is now
possible to connect a PICADY T-junction to an ARCADY roundabout to visualise how
blocking-back and basic interaction between the two junction types is handled.
If using traffic survey information in Excel spreadsheet
format, Junctions 9 can be set up to read data directly from the spreadsheets.
This feature works across demand sets and time segments, can apply to
turning counts and Heavy Vehicle information and is a great way of reducing
data entry requirements.